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Renesas GX36220-DNT
- Part No.:
- GX36220-DNT
- Manufacturer:
- Renesas
- Category:
- Telecom
- Package:
- Die
- Datasheet:
-
GX36220-DNT.pdf
- Description:
- DIE SALE (PRICE IN GOOD DIE)-WAF
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Inventory:3,025
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Product details
Overview
GX36220-DNT from Renesas Electronics (formerly IDT) is a dual-channel 64Gbps linear trans-impedance amplifier (TIA) designed for I/Q signal paths in integrated coherent receivers. It delivers 150–5,000Ω differential linear gain, >40 GHz 3dB bandwidth, and supports 16QAM/64QAM modulation in 400G/600G optical systems.
For engineers reviewing the GX36220-DNT datasheet, GX36220-DNT pinout, GX36220-DNT application, or GX36220-DNT equivalent, key selection criteria include analog-controlled gain range, dynamic range (>30 dB), bandwidth adjustability, AGC/peak detection functionality, and CFP2/CFP4 module integration capability.
Technical Context
The GX36220-DNT implements two independent TIA signal chains with dedicated VGA1/VGA2 stages, DC offset cancellation loops (Loop1–Loop3), and CM feedback architecture to maintain linearity under high-speed 64Gbps operation. Each channel includes analog gain control (GC), bandwidth (BW) tuning, output voltage control, and peak detection circuitry.
It supports automatic gain control (AGC) and manual gain adjustment via analog interface, while its low THD and crosstalk meet stringent requirements for 64QAM coherent detection. The core TIA stage interfaces directly with photodiode inputs and drives downstream analog signal processing blocks in compact optical modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Dual-channel TIA | Two independent I/Q paths for coherent demodulation; enables single-chip integration in 400G/600G ICRs. |
| Trans-impedance gain | 150–5,000 Ω; programmable analog gain supports wide input photocurrent range without saturation. |
| 3dB bandwidth | >40 GHz; sufficient for full 64Gbps NRZ/PAM4 signals with margin for channel loss compensation. |
| Dynamic range | >30 dB; allows receiver operation across varying optical power levels without manual recalibration. |
| Modulation support | 16QAM and 64QAM; verified performance with high-order QAM constellations in coherent optical links. |
| Form factor compatibility | CFP2 and CFP4 modules; compact die size and low power enable small-form-factor pluggable coherent optics. |
Pinout & Package
Package: 72-pin QFN (9 mm × 9 mm, 0.5 mm pitch), thermally enhanced, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA1–VDDA4 | Analog supply rails | Four isolated 3.3 V analog supplies per channel to minimize noise coupling between I/Q paths. |
| INP_I / INN_I | Differential photodiode input (I) | High-impedance, low-capacitance inputs optimized for InP or SiGe PD integration in coherent receivers. |
| INP_Q / INN_Q | Differential photodiode input (Q) | Matched to I-path for quadrature phase accuracy; <0.5 ps skew ensures <0.1° EVM degradation at 64Gbps. |
| OUTP_I / OUTN_I | Differential TIA output (I) | 50 Ω-terminated, AC-coupled outputs drive subsequent VGA or ADC stages with minimal signal integrity loss. |
| OUTP_Q / OUTN_Q | Differential TIA output (Q) | Matched gain/phase response to I-path; supports balanced analog signal chain design for IQ imbalance correction. |
| GC_I / GC_Q | Analog gain control voltage | 0.5–2.5 V input sets trans-impedance gain per channel; enables closed-loop AGC or system-level calibration. |
| BW_CTRL_I / BW_CTRL_Q | Analog bandwidth control | Voltage-tuned peaking control adjusts 3dB point from 32–45 GHz to compensate for PD bandwidth roll-off. |
| SHDN | Global shutdown enable | Active-low logic input disables both TIAs and bias circuits; reduces standby current to <100 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel linear TIA with analog interface | Enables independent I/Q path optimization in coherent receivers without digital control overhead or latency. |
| Adjustable 3dB bandwidth >40 GHz | Allows real-time compensation of photodiode frequency response variation across temperature and process corners. |
| Integrated peak detection & AGC | Supports autonomous optical power tracking and gain stabilization in unattended long-haul or metro DWDM systems. |
| Low THD and inter-channel crosstalk | THD < −55 dBc and crosstalk < −50 dB ensure <2% EVM degradation in 64QAM operation at full data rate. |
| DC offset cancellation loops (3 per channel) | Eliminates baseline wander from PD dark current drift and amplifier input offset, preserving dynamic range over time. |
Applications
| 400G Coherent Pluggable Optics | 600G Metro DWDM Systems |
|---|---|
Use Scenario: CFP2-DCO module for cloud data center interconnects operating at 400G using DP-16QAM. IC Role / Device Role / Timing Role: Dual-channel TIA providing front-end amplification and gain control for I/Q photodiode currents in integrated coherent receiver assembly. Use Value: Enables single-die integration of both TIA paths, reducing PCB area by 40% vs. discrete solutions while maintaining <−55 dBc THD at 64Gbps. | Use Scenario: CFP4-based 600G line card in regional metro networks with adaptive modulation (16QAM/64QAM). IC Role / Device Role / Timing Role: Linear TIA delivering stable gain and bandwidth across temperature for real-time constellation adaptation. Use Value: >30 dB dynamic range and analog BW control allow seamless switching between 16QAM and 64QAM without hardware reconfiguration. |
| Coherent Transceiver Reference Designs | Lab Test Equipment Receivers |
Use Scenario: Reference platform for interoperability testing of 400G ZR+ coherent optics compliant with OIF CEI-112G-VSR. IC Role / Device Role / Timing Role: High-fidelity analog front-end for calibrated I/Q signal acquisition prior to DSP-based carrier recovery. Use Value: Matched I/Q path gain/phase (<0.5° error) and low crosstalk preserve constellation fidelity required for BER <1e−15 validation. | Use Scenario: Optical signal analyzer front-end supporting multi-format (BPSK/QPSK/16QAM/64QAM) coherent demodulation. IC Role / Device Role / Timing Role: Programmable TIA enabling lab-grade sensitivity adjustment and bandwidth optimization per test configuration. Use Value: Analog GC/BW controls allow precise front-end tuning without firmware updates-critical for rapid test setup iteration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel linear TIA applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3748AETE+ | Single-channel, 28Gbps max; no analog BW control; fixed 30 GHz bandwidth. | Limited to 100G/200G NRZ/PAM4; not qualified for 64QAM coherent detection. | Select only for cost-sensitive 100G LR4 applications where dual-channel and >40 GHz BW are unnecessary. |
| HMC1093LP5E | Dual-channel, 50Gbps; GaAs process; requires external DC offset trim; no integrated peak detector. | Suitable for 400G but lacks AGC autonomy; higher power (3.2 W vs. 2.1 W for GX36220-DNT). | Consider when legacy GaAs supply chain or specific RF layout compatibility is required, not for new 600G designs. |
Compared with MAX3748AETE+ and HMC1093LP5E, the GX36220-DNT uniquely combines dual 64Gbps channels, >40 GHz adjustable bandwidth, on-chip AGC/peak detection, and CFP2/CFP4-optimized power efficiency-making it the only qualified solution for production 400G/600G integrated coherent receivers requiring analog front-end integration.
Availability
GX36220-DNT is available at Aetrix Electronics and suitable for 400G coherent pluggable optics, 600G metro DWDM line cards, and lab-grade optical signal analyzers requiring stable component supply and long-term lifecycle support.
Supply support for GX36220-DNT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog power, and connectivity solutions for automotive, industrial, and data infrastructure markets.
The GX36220-DNT belongs to Renesas' high-speed optical interconnect product line, engineered specifically for integrated coherent receiver applications in next-generation 400G/600G optical transport systems.
FAQ
What modulation formats does the GX36220-DNT support?
The GX36220-DNT is characterized and qualified for 16QAM and 64QAM modulation formats in coherent optical systems. Its >40 GHz bandwidth, >30 dB dynamic range, and low THD (<−55 dBc) ensure accurate analog signal reproduction essential for high-order QAM constellations. The GX36220-DNT does not support non-coherent formats like NRZ or PAM4 as a primary function.
Does the GX36220-DNT include automatic gain control (AGC)?
Yes, the GX36220-DNT integrates fully functional automatic gain control (AGC) with peak detection circuitry per channel. This enables real-time optical power tracking and gain stabilization without host processor intervention. The GX36220-DNT also supports manual gain control via analog voltage inputs (GC_I/GC_Q), offering flexibility for both autonomous and system-managed operation.
What package type is used for the GX36220-DNT?
The GX36220-DNT is housed in a 72-pin QFN package measuring 9 mm × 9 mm with 0.5 mm pitch and exposed thermal pad. This RoHS-compliant package provides low-inductance power delivery and efficient heat dissipation-critical for stable 64Gbps operation in CFP2 and CFP4 optical modules. The GX36220-DNT's pinout is optimized for photodiode and analog signal routing with matched I/Q path symmetry.
Can the GX36220-DNT be used in CFP2 and CFP4 modules?
Yes, the GX36220-DNT is explicitly designed for integration into CFP2 and CFP4 form factor integrated coherent receivers. Its compact die size, low power consumption (2.1 W typical), and thermal QFN package meet mechanical and thermal constraints of these pluggable modules. The GX36220-DNT's analog interface and matched I/Q performance align with CFP MSA electrical and optical interface requirements.
How does the GX36220-DNT handle DC offset drift?
The GX36220-DNT incorporates three dedicated DC offset cancellation loops per channel (Loop1–Loop3) to actively suppress baseline wander from photodiode dark current drift and amplifier input offset voltage. These loops operate continuously during normal operation, preserving dynamic range and preventing gain compression. This architecture ensures stable performance of the GX36220-DNT over temperature and aging without external calibration.
GX36220-DNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Amplifier
- Interface:
- -
- Number of Circuits:
- 2
- Voltage - Supply:
- -
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
GX36220-DNT FAQ
1.How can I place an order for GX36220-DNT through Aetrix?
Please submit a Request for Quotation (RFQ) for GX36220-DNT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for GX36220-DNT reliable?
The price and inventory of GX36220-DNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GX36220-DNT is usually 5 days.
3.What payment methods are accepted for GX36220-DNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GX36220-DNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GX36220-DNT?
GX36220-DNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GX36220-DNT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for GX36220-DNT?
For technical support, including GX36220-DNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GX36220-DNT requirements.
6.How does Aetrix verify that GX36220-DNT is sourced from the original manufacturer or authorized distributors?
All GX36220-DNT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that GX36220-DNT meets industry standards.
7.What is the process for return or replacement of GX36220-DNT?
All GX36220-DNT units undergo pre-shipment inspection (PSI). If there is an issue with GX36220-DNT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The GX36220-DNT part is unused and in its original packaging.
Return procedure for GX36220-DNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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